Microstops/Countersinks/Counterbores/Back Countersinks

Microstops/Countersinks/Counterbores/Back Countersinks

A Snap-on Specialty Tools Brand
Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
Kits
ATI590CSK
ATI590CSK Microstop/Countersink Cutter Kit.
Kit includes nine 1/2" diameter 100-degree countersink
cutters, with integral pilots of #40, #30, #21, #10, 3/32",
1/8", 5/32", 3/16" and 1/4", six foot pieces, and a .001"
adjustable microstop with 5/16" travel.
NSN #5133-01-428-5693
Countersinking Versatility in a
Convenient and Portable Kit.
ATI590SMKSP1 Sheet Metal Mechanics Kit.
Starter kit includes:
• 3X Rivet Gun, Sioux Brand
• 1/4" 2600 RPM Drill, Sioux Brand
• 3-1/2" Cupped Rivet Sets – 3/32", 1/8",
5/32", 3/16"
• 3-1/2" Flush Rivet Set – 1-1/4"
• Integral Pilot Countersink Cutters - #10, #20,
#30, #40
• Micro-Stop
• Hand Rivet Cutter
• Sheet Holder Pliers
• Spring Tension Clamps
• Sheet Holders 12ea. 3/32", 1/8", 5/32", 3/16"
• Drill Stops – 1ea. #10, #20, #30, #40
• Bucking Bar
• Drill Bits – 1ea. #10, #21, #30, #40, 1/8",
3/16", 3/32", 5/32"
• Retainer Spring-Quick Change
24
ATI590SMKSP1
Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
A Snap-on Specialty Tools Brand
Microstops
ATI441HSS Microstop - .001" Adjustment Straight Skirt.
Accepts up to 5/8" countersink cutter diameter using
1/4"-28 male threaded shank, utilizes needle bearings,
5/16" shaft travel, left handed hex locknut, 1/4" shaft,
straight skirt, and a thrust ball bearing for longevity.
NSN #5130-01-371-0080
High Speed Thrust Ball Bearing for Longevity.
ATI441HSS
ATI441HSA Microstop - .001" Adjustment Phenolic Tipped Skirt.
Accepts up to 9/16" countersink cutter diameter
using 1/4"-28 male threaded shank, utilizes needle
bearings, 5/16" shaft travel, left handed hex locknut,
1/4" shaft, and a thrust ball bearing for longevity.
ATI441HSBS Microstop - .001" Adjustment Straight Skirt.
Accepts up to 5/8" countersink cutter diameter using
1/4"-28 male threaded shank, utilizes ball bearings,
5/16" shaft travel, left handed hex locknut, 1/4" shaft
with chucking flats, straight skirt, and a thrust ball
bearing for longevity.
ATI441HSSPCC Microstop - .001"
Adjustment - Extended Nose.
Accepts up to 3/8" countersink cutter diameter using
1/4"-28 male threaded shank, utilizes needle bearings,
5/16" shaft travel, left handed hex locknut, 1/4" shaft,
1/2" diameter nose, 2 3/4" extended straight skirt, and a
thrust ball bearing for longevity.
ATI441HSF Microstop - .001" Adjustment Flanged Skirt.
Accepts up to 5/8" countersink cutter diameter
using 1/4"-28 male threaded shank, utilizes needle
bearings, 5/16" shaft travel, left handed hex locknut,
1/4" shaft, flanged skirt for increased stability, and a
thrust ball bearing for longevity.
ATI441HSBF Microstop - .001" Adjustment Flanged Skirt.
Accepts up to 5/8" countersink cutter diameter using
1/4"-28 male threaded shank, utilizes ball bearings,
5/16" shaft travel, left handed hex locknut, 1/4" shaft
with chucking flats, flanged skirt for increased stability,
and a thrust ball bearing for longevity.
NSN #5120-01-344-2736
ATI442HSS Microstop - .001" Adjustment Straight Skirt.
Accepts up to 5/8" countersink cutter diameter using
1/4"-28 female threaded end, utilizes needle bearings,
5/16" shaft travel, left handed hex locknut, 1/4" shaft,
straight skirt, and a thrust ball bearing for longevity.
Recommend ATI418 family of female threaded
countersink cutters and ATI416 family of countersink
pilots.
ATI441HSSPCC
ATI432B Microstop - 3/8"-24 Threaded
Jumbo - .001" Adjustment.
Accepts up to 1 1/4" countersink cutter diameter using
3/8"-24 male threaded shank, solid one piece shaft utilizes
oilite bearings, and a thrust ball bearing for longevity.
ATI462 Microstop - 3/8"-24 Threaded
Jumbo - .003in Adjustment.
Accepts up to 7/8" countersink cutter diameter using
3/8"-24 male threaded shank, solid one piece shaft
utilizes oilite bearings, and a thrust ball bearing for
longevity. NSN #3460-00-847-5135
ATI432B
ATI462H3-1.3 Microstop - 3/8"-24
Threaded Jumbo - .0005in Adjustment.
Accepts up to 1 1/4" countersink cutter diameter
using 3/8"-24 male threaded shank, solid one piece
shaft utilizes ball radial bearings and thrust bearings
for operating to 5000 RPM. Unique shaft features
chucking flats and 3/4" travel.
ATI462H7-1.3 Microstop - 7/16"-20
Threaded Jumbo - .0005in Adjustment.
Accepts up to 1 1/4" countersink cutter diameter
using 7/16"-20 male threaded shank, solid one piece
shaft utilizes ball radial bearings and thrust bearings
for operating to 5000 RPM. Unique shaft features
chucking flats and 3/4" travel.
ATI462H3-1.3
Nylon Inserts
ATI440A-13 Nylon Insert - Microstop.
Replacement insert for Microstop with interchangeable insert
foot piece. 7/8" OD. Used with ATI440A-1X Skirt.
ATI440A-14 Nylon Insert - Microstop.
Replacement insert for Microstop with interchangeable insert
foot piece. 1 1/4" OD. Used with ATI440A-1X Skirt.
ATI440A-13
WARNING
• Airframe tooling can cause flying chips.
• Wear safety goggles (user and bystanders).
25
A Snap-on Specialty Tools Brand
Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
Countersinks
Ground On-Center to Ensure Concentricity and Eliminates Run-Out.
Manufactured from M2 High Speed Steel.
ATI420D410
ATI420D43/32 Countersink - Integral Pilot
- Three Flute.
7/16" body diameter, 3/32" integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3084
ATI420D430 Countersink - Integral Pilot Three Flute.
7/16" body diameter, #30 integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3081
ATI420D43/16 Countersink - Integral Pilot
- Three Flute.
7/16" body diameter, 3/16" integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3090
ATI420D440 Countersink - Integral Pilot Three Flute.
7/16" body diameter, #40 integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3086
ATI420D45/32 Countersink - Integral
Pilot - Three Flute.
7/16" body diameter, 5/32" integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3089
ATI420D410 Countersink - Integral Pilot
- Three Flute.
7/16" body diameter, #10 integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3020
ATI420D41/8 Countersink - Integral Pilot
- Three Flute.
7/16" body diameter, 1/8" integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3085
ATI420D421 Countersink - Integral Pilot
- Three Flute.
7/16" body diameter, #21 integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3080
ATI420D41/4 Countersink - Integral Pilot
- Three Flute.
7/16" body diameter, 1/4" integrated pilot, 3 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3087
ATI420D-4PC
ATI420D-4PC Countersink - Integral
Pilot - Three Flute - Set.
Four piece set includes- 7/16" body diameter,
3-flute, 100-degree with integral pilots 3/32",
1/8", 5/32" and 3/16" in an Anodized Aluminum
Threaded Holder. NSN #5133-01-428-5685
ATI445E410
Integral Pilot
ATI445E43/32 Countersink - Integral Pilot
- Two Flute.
1/2" body diameter, 3/32" integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-2930
ATI445E430 Countersink - Integral Pilot Two Flute.
1/2" body diameter, #30 integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3081
ATI445E43/16 Countersink - Integral Pilot
- Two Flute.
1/2" body diameter, 3/16" integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3227
ATI445E440 Countersink - Integral Pilot Two Flute.
1/2" body diameter, #40 integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3094
ATI445E45/32 Countersink - Integral Pilot
- Two Flute.
1/2" body diameter, 5/32" integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3226
ATI445E410 Countersink - Integral Pilot Two Flute.
1/2" body diameter, #10 integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3091
ATI445E41/8 Countersink - Integral Pilot
- Two Flute.
1/2" body diameter, 1/8" integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3219
ATI445E421 Countersink - Integral Pilot
- Two Flute.
1/2" body diameter, #21 integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3092
ATI445E4-1/4 Countersink - Integral
Pilot - Two Flute.
1/2" body diameter, 1/4" integrated pilot, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Used with ATI441HS-product family of
Microstop or any 1/4"-28 threaded Microstop.
NSN #5133-01-397-3228
26
Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
A Snap-on Specialty Tools Brand
ATI445CTE410
Integral Pilot - Carbide Tip
ATI445CE440N Countersink - Integral
Pilot - Two Flute - Carbide Tipped.
1/2" body diameter, #40 integrated pilot, 2 flute,
carbide tipped, 100-degree cutting angle with
1/4"-28 threaded male shank. Used with ATI441HSproduct family of Microstops or any 1/4"-28
threaded Microstop. NSN #5133-01-397-3232
ATI445CTE430 Countersink - Integral
Pilot - Two Flute - Carbide Tipped.
1/2" body diameter, #30 integrated pilot, 2 flute,
carbide tipped, 100-degree cutting angle with
1/4"-28 threaded male shank. Used with ATI441HSproduct family of Microstops or any 1/4"-28
threaded Microstop. NSN #5133-01-397-3225
ATI445CTE410 Countersink - Integral
Pilot - Two Flute - Carbide Tipped.
1/2" body diameter, #10 integrated pilot, 2 flute,
carbide tipped, 100-degree cutting angle with
1/4"-28 threaded male shank. Used with ATI441HSproduct family of Microstops or any 1/4"-28
threaded Microstop. NSN #5133-01-397-3223
ATI445CTE418 Countersink - Integral
Pilot - Two Flute - Carbide Tipped.
1/2" body diameter, 1/8" integrated pilot, 2 flute,
carbide tipped, 100-degree cutting angle with
1/4"-28 threaded male shank. Used with ATI441HSproduct family of Microstops or any 1/4"-28
threaded Microstop. NSN #5133-01-397-3229
ATI445CTE421 Countersink - Integral
Pilot - Two Flute - Carbide Tipped.
1/2" body diameter, #21 integrated pilot, 2 flute,
carbide tipped, 100-degree cutting angle with
1/4"-28 threaded male shank. Used with ATI441HSproduct family of Microstops or any 1/4"-28
threaded Microstop. NSN #5133-01-397-3224
ATI445CTE414 Countersink - Integral
Pilot - Two Flute - Carbide Tipped.
1/2" body diameter, 1/4" integrated pilot, 2 flute,
carbide tipped, 100-degree cutting angle with
1/4"-28 threaded male shank. Used with ATI441HSproduct family of Microstops or any 1/4"-28
threaded Microstop. NSN #5133-01-428-5682
ATI438BRC-5
ATI438BRC-8
Briles® Type
ATI438BRC3 Countersink - Briles® Type
- 3/32" Rivet.
3/8" body diameter, .096 pilot diameter, .180 pilot
length, 3/32" rivet size, 120-degree cutting angle,
.1235 intermediate body diameter, .949 body and
shank length, 1/4"-28 threaded male shank.
ATI438BRC-5 Countersink - Briles® Type
- 5/32" Rivet.
3/8" body diameter, .159 pilot diameter, .220 pilot
length, 5/32" rivet size, 120-degree cutting angle,
.2105 intermediate body diameter,.955 body and
shank length, 1/4"-28 threaded male shank.
ATI438BRC-7 Countersink - Briles® Type
- 7/32" Rivet.
3/8" body diameter, .226 pilot diameter, .280 pilot
length, 7/32" rivet size, 120-degree cutting angle,
.3125 Intermediate body diameter, .962 body and
shank length, 1/4"-28 threaded male shank.
ATI438BRC-4 Countersink - Briles® Type
- 1/8" Rivet.
3/8" body diameter, .126 pilot diameter, .200 pilot
length, 1/8" rivet size, 120-degree cutting angle,
.1625 intermediate body diameter, .952 body and
shank length, 1/4"-28 threaded male shank.
ATI438BRC-6 Countersink - Briles® Type
- 3/16" Rivet.
3/8" body diameter, .191 pilot diameter, .250 pilot
length, 3/16" rivet size, 120-degree cutting angle,
.2585 intermediate body diameter, .958 body and
shank length, 1/4"-28 threaded male shank.
ATI438BRC-8 Countersink - Briles® Type
- 1/4" Rivet.
1/2" body diameter, .255 pilot diameter, .280 pilot
length, 1/4" rivet size, 120-degree cutting angle,
.3585 Intermediate body diameter, .966 body and
shank length, 1/4"-28 threaded male shank.
Replaceable Pilot
ATI455C-4 Countersink - Replaceable
Pilot - Two Flute.
3/8" body diameter, .086" pilot hole, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Uses ATI484 family of pilots and
ATI441HS-product family of Microstops or any
1/4"-28 threaded Microstop.
ATI455G-4 Countersink - Replaceable
Pilot - Two Flute.
5/8" body diameter, .086" pilot hole, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Uses ATI484 family of pilots and
ATI441HS-product family of Microstops or any
1/4"-28 threaded Microstop.
ATI455D-4 Countersink - Replaceable
Pilot - Two Flute.
7/16" body diameter, .086" pilot hole, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Uses ATI484 family of pilots and
ATI441HS-product family of Microstops or any
1/4"-28 threaded Microstop
ATI455H-4 Countersink - Replaceable
Pilot - Three Flute.
3/4" body diameter, .170" pilot hole, 3 flute,
100-degree cutting angle with 3/8"-24 threaded
male shank. Uses ATI435 family of pilots and
ATI462HS-product family of Microstops or any
3/8"-24 threaded Microstop.
ATI455E-4 Countersink - Replaceable
Pilot - Two Flute.
1/2" body diameter, .086" pilot hole, 2 flute,
100-degree cutting angle with 1/4"-28 threaded
male shank. Uses ATI484 family of pilots and
ATI441HS-product family of Microstops or any
1/4"-28 threaded Microstop.
ATI455J-4 Countersink - Replaceable
Pilot - Three Flute.
7/8" body diameter, .170" pilot hole, 3 flute,
100-degree cutting angle with 3/8"-24 threaded
male shank. Uses ATI435 family of pilots and
ATI462HS-product family of Microstops or any
3/8"-24 threaded Microstop.
ATI455G-4
ATI455CTE-4 Countersink - Replaceable
Pilot - Two Flute - Carbide Tipped.
1/2" body diameter, .125" pilot hole, 2 flute, carbide
tipped, 100-degree cutting angle with 1/4"-28
threaded male shank. Uses ATI485 family of pilots
and ATI441HS-product family of Microstops or any
1/4"-28 threaded Microstop.
ATI455SKE-4 Countersink - Kevlar/
Composite - Replaceable Pilot - Two
Flute.
1/2" body diameter, .086 pilot hole, 2 positive rake
cutting flutes, 1/4-28 threaded male shank for
use on Kevlar® Composites, Fiberglass and Glass
Epoxies. Uses ATI484-family of pilots.
WARNING
• Airframe tooling can cause flying chips.
• Wear safety goggles (user and bystanders).
27
A Snap-on Specialty Tools Brand
Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
Pilots
ATI416-57 Pilot.
.086" shank diameter, 1/8" pilot diameter. Ground
head diameter held to .0005" tolerance. Designed
to fit ATI418 cutter and ATI421 spotfacer.
NSN #3460-01-355-6198
ATI416-61 Pilot.
.086" shank diameter, 3/16" pilot diameter. Ground
head diameter held to .0005" tolerance. Designed to
fit ATI418 cutter and ATI421 spotfacer.
NSN #3460-01-355-6205
ATI416-59 Pilot.
.086" shank diameter, 5/32" pilot diameter. Ground
head diameter held to .0005" tolerance. Designed to
fit ATI418 cutter and ATI421 spotfacer.
NSN #3460-01-355-6195
ATI416-65 Pilot.
.086" shank diameter, 1/4" pilot diameter. Ground
head diameter held to .0005" tolerance. Designed
to fit ATI418 cutter and ATI421 spotfacer.
NSN #3460-01-355-6197
ATI435-3/8 Pilot - Countersink - 3/8".
.170 shank diameter with flat for set screw, 3/8"
pilot diameter, undercut to maintain concentricity
and prevent breakage. Use with ATI435H and
ATI455H and family of countersink cutters 3/4" and
larger body diameter.
ATI435-5/16 Pilot - Countersink - 5/16".
.170 shank diameter with flat for set screw, 5/16"
pilot diameter, undercut to maintain concentricity
and prevent breakage. Use with ATI435H and
ATI455H and family of countersink cutters 3/4" and
larger body diameter. NSN #3460-00-350-1445
ATI416-65
ATI435-3/8
ATI484-2
ATI484-57
ATI484-2 Pilot - Countersink - .086" Shank.
#40 diameter. Use with ATI455 family of replaceable
piloted countersink cutters.
ATI484-56 Pilot - Countersink - .086" Shank.
3/32" diameter. Use with ATI455 family of replaceable
piloted countersink cutters. NSN #3460-01-292-4754
ATI484-61 Pilot - Countersink - .086" Shank.
3/16" diameter. Use with ATI455 family of replaceable
piloted countersink cutters. NSN #3460-01-292-4757
ATI484-12 Pilot - Countersink - .086" Shank.
#30 diameter. Use with ATI455 family of replaceable
piloted countersink cutters.
ATI484-57 Pilot - Countersink - .086" Shank.
1/8" diameter. Use with ATI455 family of replaceable
piloted countersink cutters. NSN #3460-01-292-4755
ATI484-63 Pilot - Countersink - .086" Shank.
7/32" diameter. Use with ATI455 family of replaceable
piloted countersink cutters.
ATI484-21 Pilot - Countersink - .086" Shank.
#21 diameter. Use with ATI455 family of replaceable
piloted countersink cutters.
ATI484-59 Pilot - Countersink - .086" Shank.
5/32" diameter. Use with ATI455 family of replaceable
piloted countersink cutters. NSN #3460-01-292-4756
ATI484-65 Pilot - Countersink - .086" Shank.
1/4" diameter. Use with ATI455 family of replaceable
piloted countersink cutters. NSN #3460-01-292-4758
Extensions
ATI470A-1 Extension-Counterbore.
1/4" shank diameter, 2 set screws to secure
counterbore shaft, 4" overall length.
ATI470B1 Extension - Countersink.
1/4" shank diameter, 1/4"-28 female thread with
120-degree seating angle, 4" Overall Length.
28
ATI470B1
ATI470A-1
Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
A Snap-on Specialty Tools Brand
Counterbores
Heat-Treated M2 High Speed Steel
ATI488C-25
ATI488C-21
ATI488C-1 Counterbore - Aircraft Type 1/4" Cutting Diameter.
4-flute, 2 3/8" length, 1/4" shank diameter, 3/32"
pilot hole, uses ATI489A family of pilots.
ATI488C-10 Counterbore - Aircraft Type 17/32" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
ATI488C-19 Counterbore - Aircraft Type 13/16" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-3 Counterbore - Aircraft Type 5/16" Cutting Diameter.
4-flute, 2 3/8" length, 1/4" shank diameter, 3/32"
pilot hole, uses ATI489A family of pilots.
ATI488C-11 Counterbore - Aircraft Type 9/16" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
ATI488C-21 Counterbore - Aircraft Type 7/8" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-5 Counterbore - Aircraft Type 3/8" Cutting Diameter.
4-flute, 2 3/8" length, 1/4" shank diameter, 3/32"
pilot hole, uses ATI489A family of pilots.
ATI488C-12 Counterbore - Aircraft Type 19/32" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
ATI488C-25 Counterbore - Aircraft Type 1" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-6 Counterbore - Aircraft Type 13/32" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
ATI488C-13 Counterbore - Aircraft Type 5/8" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
ATI488C-29 Counterbore - Aircraft Type 1 1/4" Cutting Diameter.
4-flute, 2 13/16" length, 3/8" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-7 Counterbore - Aircraft Type 7/16" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
ATI488C-15 Counterbore - Aircraft Type 11/16" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-31 Counterbore - Aircraft Type 1 3/8" Cutting Diameter.
4-flute, 2 13/16" length, 3/8" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-8 Counterbore - Aircraft Type 15/32" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
ATI488C-17 Counterbore - Aircraft Type 3/4" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-32 Counterbore - Aircraft Type 1 1/2" Cutting Diameter.
4-flute, 2 13/16" length, 3/8" shank diameter, 3/16"
pilot hole, uses ATI489C family of pilots.
ATI488C-9 Counterbore - Aircraft Type 1/2" Cutting Diameter.
4-flute, 2 13/16" length, 1/4" shank diameter, 1/8"
pilot hole, uses ATI489B family of pilots.
Counterbore Pilots
ATI489A-1 Pilot - Counterbore, 3/32"
Shank Diameter, 3/32" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-1
through ATI488C-5 counterbores.
NSN #3460-01-513-0144
ATI489A-5 Pilot - Counterbore, 3/32"
Shank Diameter, 3/16" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-1
through ATI488C-5 counterbores.
NSN #3460-00-932-3313
ATI489A-3 Pilot - Counterbore, 3/32"
Shank Diameter, 5/32" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-1
through ATI488C-5 counterbores.
ATI489A-8 Pilot - Counterbore, 3/32"
Shank Diameter, 1/4" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-1
through ATI488C-5 counterbores.
NSN #3460-00-932-3316
ATI489B-2 Pilot - Counterbore, 1/8" Shank
Diameter, 1/8" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-6 Pilot - Counterbore, 1/8" Shank
Diameter, #10 Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-11 Pilot - Counterbore, 1/8"
Shank Diameter, 5/16" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-3 Pilot - Counterbore, 1/8" Shank
Diameter, 5/32" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-8 Pilot - Counterbore, 1/8" Shank
Diameter, 1/4" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-13 Pilot - Counterbore, 1/8"
Shank Diameter, 3/8" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-5 Pilot - Counterbore, 1/8" Shank
Diameter, 3/16" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-10 Pilot - Counterbore, 1/8"
Shank Diameter, 9/32" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489B-14 Pilot - Counterbore, 1/8"
Shank Diameter, 13/32" Pilot Diameter.
Flat surface for set screw security, use with ATI488C-6
through ATI488C-13 counterbores.
ATI489A-1
ATI489B-8
WARNING
• Airframe tooling can cause flying chips.
• Wear safety goggles (user and bystanders).
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Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
A Snap-on Specialty Tools Brand
Counterbore Pilots
ATI489C-5
ATI489C-5 Pilot - Counterbore, 3/16"
Shank Diameter, 3/16" Pilot Diameter.
Flat surface for set screw security, use with
ATI488C-14 through ATI488C-32 counterbores.
ATI489C-11 Pilot - Counterbore, 3/16"
Shank Diameter, 5/16" Pilot Diameter.
Flat surface for set screw security, use with
ATI488C-14 through ATI488C-32 counterbores.
ATI489C-15 Pilot - Counterbore, 3/16"
Shank Diameter, 7/16" Pilot Diameter.
Flat surface for set screw security, use with
ATI488C-14 through ATI488C-32 counterbores.
ATI489C-8 Pilot - Counterbore, 3/16"
Shank Diameter, 1/4" Pilot Diameter.
Flat surface for set screw security, use with
ATI488C-14 through ATI488C-32 counterbores.
ATI489C-13 Pilot - Counterbore, 3/16"
Shank Diameter, 3/8" Pilot Diameter.
Flat surface for set screw security, use with
ATI488C-14 through ATI488C-32 counterbores.
ATI489C-17 Pilot - Counterbore, 3/16"
Shank Diameter, 1/2" Pilot Diameter.
Flat surface for set screw security, use with
ATI488C-14 through ATI488C-32 counterbores.
Kits
ATI590S Back Spot Facer
Cutter Kit - 16 Pieces.
Kit includes 8 back spot facers and
8 pilots respectfully;
• 1/4" diameter with 3/32" pilot
• 5/16"diameter with 1/8" pilot
• 3/8" diameter with 5/32" pilot
• 1/2" diameter with 3/16" pilot
• 5/8" diameter with 1/4" pilot
• 3/4" diameter with 5/16" pilot
• 1" diameter with 3/8" pilot
• 1 1/4" diameter with 1/2" pilot
NSN #5133-01-014-5669
ATI590TA Back Countersink
Cutter Kit - 16 Pieces.
Kit includes 8, 100-degree countersinks
and 8 pilots respectfully;
• 1/4" diameter with 3/32" pilot
• 5/16"diameter with 1/8" pilot
• 3/8" diameter with 5/32" pilot
• 1/2" diameter with 3/16" pilot
• 3/4" diameter with 1/4" pilot
• 7/8" diameter with 5/16" pilot,
• 1" diameter with 3/8" pilot
• 1 1/4" diameter with 1/2" pilot.
NSN #5133-01-428-5695
ATI590S
Back Spotfacers
ATI403A Back Spotfacer - 1/4" OD.
1/4" Body Diameter, 3/32" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-1 Pilot. NSN #5133-01-392-8987
ATI403M Back Spotfacer - 5/8" OD.
5/8" Body Diameter, 1/4" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-5 Pilot.
ATI403C Back Spotfacer - 5/16" OD.
5/16" Body Diameter, 1/8" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-2 Pilot. NSN #5133-01-392-8984
ATI403Q Back Spotfacer - 3/4" OD.
3/4" Body Diameter, 1/4" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-5 Pilot.
ATI403D Back Spotfacer - 5/16" OD.
5/16" Body Diameter, 5/32" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-3 Pilot.
ATI403R Back Spotfacer - 3/4" OD.
3/4" Body Diameter, 5/16" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-6 Pilot.
ATI403F Back Spotfacer - 3/8" OD.
3/8" Body Diameter, 5/32" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-3 Pilot. NSN #5133-01-392-8985
ATI403X Back Spotfacer- 1 1/4" OD.
1-1/4" Body Diameter, 1/2" Pilot Hole, 4 Flute, 100o Cutting
Angle, .03 Corner Radius for reverse spotfacing and
counterboring in confined areas. Use ATI404-8 Pilot.
ATI403G Back Spotfacer - 7/16" OD.
7/16" Body Diameter, 3/16" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-4 Pilot. NSN #5133-01-392-8989
ATI403R
ATI403I Back Spotfacer - 1/2" OD.
1/2" Body Diameter, 3/16" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-4 Pilot.
ATI403K Back Spotfacer - 9/16" OD.
9/16" Body Diameter, 3/16" Pilot Hole, 4 Flute, 100o Cutting Angle,
.03 Corner Radius for reverse spotfacing and counterboring in
confined areas. Use ATI404-4 Pilot.
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ATI403F
ATI403X
Microstops/Countersinks/Counterbores/Back Countersinks & Spotfacers
A Snap-on Specialty Tools Brand
Back Countersinks
ATI402I-4
ATI402B-4 Back Countersink - 1/4" OD.
1/4" Body Diameter, 3/32" Pilot Hole, 4 Flute, 100o Cutting Angle
for use in restricted areas when direct countersinking is not
possible. Use ATI404-1 Pilot. NSN #5133-01-428-5631
ATI402I-4 Back Countersink - 1/2" OD.
1/2" Body Diameter, 3/16" Pilot Hole, 4 Flute, 100o Cutting Angle
for use in restricted areas when direct countersinking is not
possible. Use ATI404-4 Pilot. NSN #5133-01-428-5610
ATI402C-4 Back Countersink - 5/16" OD.
5/16" Body Diameter, 1/8" Pilot Hole, 4 Flute, 100o Cutting Angle
for use in restricted areas when direct countersinking is not
possible. Use ATI404-2 Pilot. NSN #5133-01-057-0979
ATI402M-4 Back Countersink - 5/8" OD.
5/8" Body Diameter, 1/4" Pilot Hole, 4 Flute, 100o Cutting Angle
for use in restricted areas when direct countersinking is not
possible. Use ATI404-5 Pilot. NSN #5133-01-428-5656
ATI402F-4 Back Countersink - 3/8" OD.
3/8" Body Diameter, 5/32" Pilot Hole, 4 Flute, 100o Cutting Angle
for use in restricted areas when direct countersinking is not
possible. Use ATI404-3 Pilot. NSN #5133-01-428-5638
ATI402M-4
Pilots
ATI404-1 3/32" Back Spotfacer Pilot.
3/32" diameter, 6" overall length, positive lock.
AKA: Bayonet Lock. NSN #5133-01-429-5868
ATI4045 1/4" Back Spotfacer Pilot.
1/4" diameter, 6" overall length, positive lock.
AKA: Bayonet Lock. NSN #3460-00-902-1391
ATI404-2 1/8" Back Spotfacer Pilot.
1/8" diameter, 6" overall length, positive lock.
AKA: Bayonet Lock. NSN #3460-00-902-1363
ATI404-6 5/16" Back Spotfacer Pilot.
5/16" diameter, 6" overall length, positive lock.
AKA: Bayonet Lock. NSN #5133-01-429-5866
ATI404-3 5/32" Back Spotfacer Pilot.
5/32" diameter, 6" overall length, positive lock.
AKA: Bayonet Lock. NSN #3460-00-902-1370
ATI404-8 1/2" Back Spotfacer Pilot.
1/2" diameter, 6" overall length, positive lock.
AKA: Bayonet Lock. NSN #5133-01-429-5867
ATI4044 3/16" Back Spotfacer Pilot.
3/16" diameter, 6" overall length, positive lock.
AKA: Bayonet Lock. NSN #3460-00-902-1374
ATI4044
ATI4045
ATI404-6
ATI404-8
WARNING
• Airframe tooling can cause flying chips.
• Wear safety goggles (user and bystanders).
31